Girl Next Room: Richy Rich

Other name: หอนี้ชะนีแจ่ม รวยนะคะ รู้ยัง

Synopsis:

Duchess (or Daeng Lek), a newly rich university student, is given to ostentatiousness. She seeks approval from the exclusive parts of society she was barred from when she was poor. She chances to encounter Krathing, who knows about her misfortunate past as Daeng Lek and takes to teasing her.